Power-operated typing mechanism for typewriters or like machines



5 4 9 L1 E Tm H Kw.. .u JJ ne 1 .l F

June 28, 1949.

POWER-OPERATED TYPING MECHANISM FOR TYPEWRITERS OR LIKE MACHINES t driving `the `type bars, some parts being shown in f Patented `une 28, 1949 POWER-opnamen TYPING rMltonANi-SM For. fry-PEWMnERs 0R LiKE-MAGHINES J 0h11 J- Kittel, i-St Albans, fN flmsssiseor to neral i vTymiwriter Company, Inc.l,Newr York; rN. Y., ,a

.corporation of `New York Application July I27, 1945, Serial No.` 6075293 114 Claims i l This invention relates to typewriting machines, and Amore particularly .to power operated .mechanism for actuating various. instrumentalities rineluded in such machines,` for 4exam-ple ftype vac- ;tions, .escapement mechanism, andrivbbon Vibrator mechanism. 1.x An object of the invention is to provide mech-i anism embodying structural features rand'. ar-l rangements providing advantages as` compared to prior mechanism of the same general kind.

Another object is tol provide Inechanismiof the kind referred to including a newand improved arrangement of `parts .for transmitting cushioned power or driving effort to actuate :the instrumen- A5 uciated `with end type i bars.

iMechanisrn construction in accordance with the invention :is illustrated as .being embodied `in .1a typewriter having a `basic structural .arrange- ..ment..generally similar-ftosthatfof the Royal stand- .4 10. ard typewriter. -Conventional partstncludedlin this :basic structure ,and shown Lin .part in the ..accompanying drawing include a .stationary frame, ...apontionrof which :is-indicated at A. *Mounted for reciprocation on the frame A is acarriage `B talities referred to smoothly with aminimumpf 15cquipped with arcylinderoriplaten `C'uulhelcarshocks.

Another object of the invention `isnto ,provide mechanism of the character stated `in,-w,l'1,i ch;fthe

driving effort or power Vis,transmitte 21 :through riage is equippedwitha bottom` rail .il which 4.is

supported iloyiballlibearings 2, in turn carriedby l `aebottomrail V3 mounted ont-he :frame part A.

Letter :spacingitravel of the;'carriageBis `conan impositive drive coupling, e. g. aV .hinetictype ggrtrolled byaniescapement.mechanismlD ofjknown fluid coupling Whichhas a capacity or characteristics enabling the obtaining ofthe `zuvantages of smooth cushioned machine operation'andialso `uniformity `of type impression.

`@formincluding an escapement .frame `ll mounted oni-the r.mai-n iframe` Arend ...serving tojournal an l :escapement pinion a5 `meshing with a carriage ies- `ic@percenttrack (not shown). .nnvfescanement Another object is. to provide new andimpmted 25 Wheelgfast.withrthepinion 15 is adaptedtito coconnections between a s et `of type'bars gonaishiitable segment and a power driven .rotor ,orythe like, the arrangement and cooperation ofthe connections beingsuch that the. segment islshiftahle ,operatewithadog .rocker assembly 1 lpivoted on .e e .frame Arasfat. -lheiassembly `hincludes a ...depending .arm .9 and adjustable :clevis .support iunior ya `.roller Irl fadaptedto be Qneratedlby a freely without restraint by the connections, l.and pressure plate l2; .Ca/Id-by .2m iesapementfbail the typing members are all driven to the-printing point so as lto make substantiallyuniform `type impressions.

Another object is to provide `a novel mounting t by which a bail or like rockable member iorfop- .11.3; rekably .mounted asiat `ill-Allin anorel manner las will l`be l describedlater.

\ :Inpperatioa when the bail 4. l 3 iis rocksdislock- .-wise, the pressure `plate l2 @messes-.whe roller I l :urs fl L the rocker assembly :l inneres;4 back totfits ...starting position. T0l .and froroclsinsoffthe :assembly -l fthrQush--ons complete cyclefnermits when a different key lever has beendepressed `,and has not returned tonormalor raised position.

Other objects` Will become apparent ,ironia a reading of the following description, `.tluieappended claims, and the accompanyingdrawingnu in which:

Figure 1 is a vertical fore-andeaftfsection .ci a typewriter including mechanism embodyngthe invention, vsome conventional .typewriter lpaletas being shown only fragmentarily andothers beingd;

omitted;

Figure 2 is an enlarged scale fragmentary yertical section of a 1portionof the mech smi-tor elevation; and

3 bail I3 is rocked to actuate the escapement mechanism in the .manner previously described, the ear I9 will be thrust forwardly so as to operate the ribbon vibrator mechanism for positioning the ribbon (not shown) in operative position at the writing line.

Power. operated mechanism is provided for operating the type actions, the escapement mechanism D, and the ear I9 for actuating the ribbon vibrator. For mounting parts of the power operated mechanism the frame A is provided with cross bars and 2| and with end plates 22 and 23.

Journaled for rot-ation on the main frame A is a power driven rotary element 24 formed with longitudinally extending teeth 25. The element 24 is driven by an electric motor 26, power from which is transmitted through an impositive drive coupling preferably a kinetic type iiuid coupling 21 of the kind disclosed in Patent No. 2,279,141 issued to John J. Kittel, April 7, 1942. The coupling 21 includes a driving element 28 rotatable by the motor 25, a driven element 29, and a body of fluid 30, for example oil, confined within the driving element 28. unison with the driven element 29 extends through a sealing device 32 and is provided with a helical gear 33. which meshes with a helical gear 34 fast with the toothed driving element 24. In operation, the motor 26 transmits drive through the coupling 21 and gears 33--34 to rotate the element 24 continuously.

Associated with each type bar is key controlled mechanism for placing the type bar in operative connection with the rotor 24 for a limited period to enable the rotor to drive the type bar toward printing position. With the exception of differences in the sizes of certain constituent elements in the mechanism, the mechanisms for connecting the various type bars to the rotor 24 are the same and it will be necessary to describe only one of the mechanisms in detail, As shown in Figure 1, the type bar` |12L which is pivoted near the center of the segment I5 is formed with a heel 36 which is connected to the rear end of a link 31, the front end of which is connected to a lever 33a pivoted as at 39 on the frame cross bar 20. Pivoted as at 40 on the lever 389L is an actuator link or pawl 4Ia which extends rearwardly and across the rotor 24.

The link or pawl 4Ia is formed with a nose 42 which normally is so disposed as not to be enga-ged by the teeth 25 on the rotor 24. The link 4Ia is held in this normal position by a link 43 connected at its lower end to the rear end of the link 4 Ia and connected at its upper end to one arm 44 of a three armed lever 45 pivoted as at 46 on the frame cross bar'2 I. A spring 41 interposed between an arm 48 on the three armed lever 45 and a knock out device generally designated 49 yieldably urges the lever clockwise so as to lift the link 43 and thereby yieldably hold the actuator 4Ia in the position shown in Figure 1, wherein the nose 42 is out of the path of rotation of the rotor teeth 25.

In order to cause the type bar I1a to be driven to typing position, the actuator link 4 Ia is moved downwardly to bring its nose 42 into engagement with a tooth 25 on the power driven element 24, whereupon the actuator 4Ia is moved rearwardly so as to rock the lever 38a counterclockwise, pull on the link 31, and swing the type bar I1 toward the platen C. The mechanism for bringing the actuator nose 42 into engagement with the rotor 24 includes a key lever 50 pivoted A shaft 3l rotatable inl as at 5I on the frame cross bar 2l), a link 52 pivoted at its lower end to the key lever 5|)a and at its upper end to a lever 53 pivoted `as at 54 on a frame cross bar 55, and a link 56 pivoted at its front end to the lever 53 and at its rear end to an ill on the lever 45. The spring 41 previously referred to yieldably holds the actuator 4 la in its normal position out of engagement with the rotor 24 and through the link 55, lever 53, and link 52 also holds the key lever 50EL in its normal rest position in which it engages a cushion stop 58 carried by a cross bar 5S on the main frame.

In operation, when the key lever 59a is depressed, the link 52, lever 53, and link 56 are moved to rock the three armed lever 45 counterclockwise against the urge of the spring 41 so as to move the actuator nose 42 into engagement with the toothed element 24, causing the type bar to be moved to typing position as previously described.

Means are provided for disengaging the actuator nose 42 from the toothed element 24 before the type bar I'I'a has been moved completely to typing position, the arrangement being such l that the momentum of the type bar and its connected linkage causes the type bar to move the remainder of the way to printing position. The means for disengaging the actuator from the toothed element comprises the knock out device 49 previously referred to. The device 49 includes a U-shaped mounting portion or movable guide 60 slidably engaging the frame cross bar 2I and substantially flat knock out parts 6I and 62 disposed at an obtuse angle to each other.

The device 49 is held stationarily on the cross bar 2| with the knock out parts 5I and 62 so positioned relatively to the rotor 24 as to engage the actuator 4I 4and force it out of engagement i." with the rotor 24 just before the type head reaches typing position. The actuator link 4Ia has its rear end shaped to provide an inclined portion 63 and a rounded heel 54. As shown in Figure 2, during driving of the link 4I@ by the rotor 24, the heel 54 will engage the knock out part 6I so that as the link 4I moves rearwardly it first will gradually be moved radially and outwardly from the rotor 24 toward a position of disengagement from the rotor. Before the link 4ILPL has been completely disengaged vfrom the rotor the link inclined part 63 moves into engagement with the knock out part 52 on the device 49 whereupon the actuator is moved abruptly out of engagement with the rotor 24, By this time the key lever 5i]a will have been released, enabling the spring 41 to return the key operated parts to their normal positions shown in Figure l.

The typewriter includes a series of actuator links similar to the link 4Ia and a series of levers similar to the lever 38av arranged in alignment to rock about the pivotal axis 39 parallel to the axis of the rotor 24 and being connected to the respective type bars mounted on the segment I5. The knock out parts 6I associated with each actuator link are formed separately so as to be individually bendable to adjusted positions. 'Ihis arrangement enables each type bar drive mechanism to be adjusted individually as to the phases of the movements by which the several actuators are disengaged from the rotor 24. This enables the mechanism to be adjusted so as to provide uniformity of type bar impact and uniformity of key lever dip or downward movement.

In order to permit easy shifting of the segment I5 without binding or interference by the connec- `links 4 Il--4Ib to their normal positions.

tions between the various type bars and the associated driving linkages, the levers corresponding-to the lever 38a but connected to type bars at the ends of the segment I5 instead of at the middle thereof, are longer than the lever` 38a. One of the longer levers associated with an end type bar is shown-at 381?.` Intervening levers increase progressively in length from the 1ever'18a outwardly to the end lever 381. `Ii? theilonger levers, `for example-the lever 38h, should have the same angular rocking motion as the centerlever 38e,- the arcuate travelsof their upper end portions would be greater than the arcuate travels of the endsof the shorter levers, and it would be diiiicult if not impossible to obtain uniformityof type bar impact. In' accordance withthe invention, the actuating mechanism is` so constructed that the levers 38E-38D are rockable through different angular distances so that the arcuate distances traversed bythe upper ends of the levers will be substantially. equal. As shown inFigure 3 the actuator Mawhich it will be recalled is connected to the link 38a at the center of the segment, is shorter than the actuator Mb which is connected to the. long lever 38., theeffective lengths of the actuators `being measured, for example, between the pivots `49 andnoses 42. Theshorter link 4Ia will beinoperative engagement with the toothed rotor 24 longer thanthe longerA link 4Ib, and consequently the shorter lever .38a will be power-rocked through a greater angle than the longer lever 3th. Thus. the ends of the levers BBL-38h will partake of substantially the same arcuate movements, andvuniform type impressions will be made.

Means are provided forvarying the timing of disengagement of the actuators IIa-Mb from the rotor 24 so as to` obtainV type impressions of varying intensity. For accomplishing this adjustment the entire knock out device 49 can be slid up or down on the cross bar 2| which serves as a guide mountingthe device 49 for vertical adjusting movements. The springs 4l connected between the several three armed levers 45 and the device 49 urge the latter upwardly. Vertical adjustment of the device 49 is effected easily by rotation oi an eccentric rod 65 interposed between the bottomface of the guide 2l andthe cross piece extending between the two legs of the mounting portion 69 of the device 49. The eccentric rod B5 may be rocked from outside the machine frame by an arm and pointer G6 xed to the rod and the position 0f which s indicated by a scale 61.

` The springs 4l perform the dual function of urging the knock out device 49 upwardly and also biasing 'the levers 45 and hence ythe actuators or Springs imay be connected betweenthe actuators and an anchor plate 63'di on the cross bar 29 for partially balancing the action of the springs 4l. The springs 68 and 4T working against each other prevent the interposed links and levers from rattling. The springs 68 also serve to restore the type bar and its associated connections back to normal or state of rest positions.

Y The iiuid coupling 2l' drives the rotor 2d with cushioned shock labsorbing power providing the advantage of smooth operation with a minimum of shocks and noise. When the typewriter is operated very rapidly, imposing an almost con- Vtransmitted tothe type bars Awould lessen and the type bar impressions Awould-vary; In order to preventi this, the coupling 21j-is :ot sucht ample cap acityA and its drivenl elementshas such a` large amountA `of` inertia that ,theX element-` 2-91- and-.l the rotor 24 are not slowed" down suthciently even duringrapid typingito'result anoticeab'l'e difference in the type bar; impressions; l

Int order. to facilitateassembling andiserv-icing ofi the interiorpartsoffthef-mach-ine,-l theL escapement bail I3 is mounted as at--I4-tcrock ona bracket 69 carried by and vertically -shitable with` the type l bart lsegments-|15:

this respect the escapernent mechari-ismandL associated parts differ from the.A c:instruction-.iny the/Royal 7Standardv typewriter in` vvliicl1,-thex escapemen-t bail. is mounted pito-tally.l on \the=stationaryv main trame; The bracket `69,` comprises spacedf. parallel fparts, one of` whichv is `shovvn=at:-'lll. Both-.of the4 spaced bracket. parts `are, secured...to the-:segment I 5 so as to.. be shiftable therewith; Pivotedmn-4 the bracket .69 `asatf'lilis alever: 'Ii2,.fthe lower arm of which is. connected-tothe frontend-of a-pull` link I The rear end of. the `linl1t..'I3-is formed. with a hook.. llt. embracing a.. bait?! 5f. forming. partvoi. the escapeinent baillI 3. .l Anspring `lIli-.interposedrunder tension between ,l thel.,uppen.end ofotheltlever .72 and an ear 'llonthelsegmentl Irurges, the lever 'i9 counterclockwise, aslxtievvedrintliguro` l. A lever '13.. parallellto. the lever: 512;;l is.,.pivoted 1 at its lower endasat l.9on,thel bracket 69@ The tops of the levers lf2, andxJB lare. pivotedrespectively at .ita ahdttlto a,.projection..zlhwhich.is: fastwith and `extends rearwardlydromnan. arcuate` universal bar `t2 so.ppsitionednasrtolbeithrustrearwardly by a type barswhenlthelattermoves to typing position.

In operation, a typeL ban, moi/edito typing position engages the. universal,:bar, 821.and2. thrusts. it rearwardly so as to rock the leverspllZandfIiclock- Wise, ,causing` the link,{13 110J bapulled forwardly thereby rocking the escapement bail I3 clockwise and loperating ,the` Qscapeinent. mechanism D: to cause the carriage; Bltoadvanceione.letters space.

A type bar may, if. desiredtlbegcaused to-.perform repeated typing; operations .bymerelyholdingf the `associated keylever-depnessed '.zlonex-ample, for underlining repeated` hyphenatinguor.. successive 'period writing as, wheny .preparingtbills or. statements, the appropriatefkeyleveaz `is-vclepressed only once and is heldA depressedzuntiltheidesiredhnumber of repetitive characters hassbeenityped; The repeated type vbar. operationvwill be accompanied by` repeated operation ofttheiiescapement; mechanism. When thedepressedthey.` is-released the type bar and carriageiwill .comestoirest i Means are providedforpreventing operative depressing of a key levenbefcre awpreviously depressed key- `lever. has.-returnedtoitsnormal position. In the fcrrnshowmthe-usualfRLoyal line lock `plate Bit. ismodi-fied-byehavingformed integrally therewith an extension;` blade 83w-hich serves as ein-operating partzadaptedf-to be-engaged by the heel-Stef an--abutment-8E1-on any key lever w-heniit` isdepressed: `'Itho-device cornprising v the partss` 821 andVv 831 is) generally 4of l U- l shape with theMleg-.Stu normallyextending-diagolkeylevers. 'f The heeis BVS/"nd toes' 5510i theabhtments 85 are separated by a slot or slit 81 making it possible to adjust each heel and toe individually to positions assuring their proper cooperation with the locking device 82, 83.

The mechanism described with reference to the drawings embodies the invention in the form now preferred but it is evident that changes may be made without departing from the invention as defined in the claims.

I claim:

1. In a typewriting machine, a frame; typecarrying members; means mounting said members for movement from inactive position to typing position and return; a power-driven toothed rotary element; and, respectively associated with each of a plurality of said members, a first lever pivoted on said frame at a point on one side of said rotary element and being operatively connected to said type-carrying member; a rst link connected to said first lever and extending transversely across said rotary element and having a nose normally disengaged from but being engageable with said rotary element for being actuated thereby to roel; said nrst lever and thus move said type-carrying member to typing position; a second lever pivoted on said frame at a point on the opposite side oi' said rotary element and having an arm extending transversely with respect to said rotary element and toward said first lever; a second link connecting said first link to said arm oi' said second lever; means for biasing said first link to be normally disengaged from said rotary element; key-operated means; and a third link operatively connecting said key-operated means to another arm oi' said second lever, whereby upon operation oi said key-operated means said :nose is moved into engagement with said rotary element and said rst link and first lever are driven to move said type-carrying member to typing position.

2. fin a typewriting machine, type-carrying members; means mounting said members for movement from inactive position to typing position and return; a power driven toothed rotary element; and, respectively associated with each oi a plurality of said members, power transmitting mechanism operatively connected to said type-carrying member' and including an actuator normally disengaged from said rotary element but being adapted to be moved into engagement with said element to be driven thereby so as to effect movement of said typecarrying member to typing position; key-operated means ior moving said actuator into engagement with said rotary element; and knock-out means i'or moving said actuator out of engagement with said rotary element including a rst substantially ilat part initially engageable by said actuator for iirst moving the latter relatively slowly toward disengagement from said rotary element, and a second substantially dat part disposed at an obtuse angle to said iii-st ilat part and being subsequently engageable by said actuator for moving said actuator relatively abruptly from engagement with said rotary element, at least one of said iiat parts being angularly displaceable to vary the obtuse angle between said at parts and thus to vary the relative abruptness o disengaging movement of said actuator effected by the respective at parts.

3.V n a typewriting machine, type-carrying members; means mounting said members for movement from inactive position to typing posiktion and return; a power driven toothed rotary element; and tentatively associated `with Esch of a plurality of said members, power transmitting mechanism operatively connected to said typecarrying member and including an actuator normally disengaged from said rotary element but being adapted to be moved into engagement with said element to be driven thereby so as to effect movement of said type-carrying member to typing position; key-operated means for moving said actuator into engagement with said rotary element; and a knock-out device engageable with said actuator and having substantially dat portions disposed at an obtuse angle to each other and over which said actuator slides for successively moving said actuator relatively slowly toward disengagement from said rotary element and then moving said actuator relatively abruptly out of engagement with said rotary element, said knock-out device being substantially stationary in operation andat least one of the iiat portions of said device being bendable to vary the obtuse angle between said flat portions and thus vary the relative abruptness of disengaging movement of said actuator effected by the respective ilat portions.

ll. In a typewriting machine, type-carrying members; means mounting said members for movement from inactive position to typing position and return; a power driven toothed rotary element; and, respectively associated with each of a plurality ol' said members, power transmitting mechanism operatively connected to said typecarrying member and including an actuator normally disengaged vfrom said rotary element but being adapted to be moved into engagement with said element to be driven thereby so as to effect movement of said type-carrying member to typing position; key-operated means for moving said actuator into engagement with said rotary element; a knock-out device engageable by said actuator for moving the actuator out of engagement with said rotary element; means mounting said knock out device for adjustment relatively to said rotary element; spring means urging said actuator to its normal position and also urging said knock out device in one direction; and an eccentric operatively connected to said knock out device and being rotatable for moving said device against the urge of said spring means to different positions of adjustment to thereby vary the point of disengagement of said actuator from said rotary element and consequently vary the type impact intensity.

5. In a typewriting machine, type-carrying members; means mounting said members for movement from inactive position to typing position and return; a power driven toothed rotary element; and, respectively associated with each of a plurality of said members, power transmitting mechanism operatively connected to said typecarrying member and including an actuator normally disengaged from said rotary element but being adapted to be moved into engagement with said element to be driven thereby so as to eiTect movement of said type-carrying member to typing position; key-operated means for moving said actuator into engagement with said rotary element; a knock-out device including a substantially U-shaped portion and a part engageable by said actuator for moving the latter out of engagement with said rotary element; a fixed guide on which said U-shaped portion is slidable for mounting said knock-out device for adjusting movement to different positions with respect to said rotary element; and means lfor moving said alii/4,741

6. In-a typewritingl machine, type-carrying members; =1neansmountingsaid members for movementirom inactive -position to typing posi-` tion and` return; Ia power driven toothed l1 rotary element; andfrespectively associated'with each of a plurality of said-membersypower transmitting mechanism operatively connected to said type carrying member-and including an actuator` normally-disengaged -from -said rotary 'element but being adapted 4to be -moved 1 into engagement l withrsaid element to ybe driven thereby so as to effect `movement of l said Atype-carrying member` to typing'positiomkey-operated means for movingA said actuator intoengagement withsaid rotary element; `a lmock-outdevice including a substantially-U-shapedpoction and a part en` gageable by rsaid actuator for -movin-g .the latter outY of engagement with said rotary. element; `a xedlguide-on which sadwU-shaped portion is slidable for mounting` said knock-out device for; adjusting movement toditerent posi-tions with respect to said rotary element; and a rotatable eccentric interposed between said 'guide'` and the cross piece `of said U-shapedportion lfor moving said knock-out -device to different positions.

7. In a typewriting v4machine,y type-carrying members; means mounting said members formovement :frominactive-position to typing posi tion and returnya power driven toothed rotary clement; and, respectively associated with each'` of ay plurality 'of said membersepower transmitting A mechanism operatively connected "to said typecarrying member and including an actuator normally disengaged fromsaid rotary `elementbut` being adapted to bemovedinto engagement with said clement to be driven thereby so aslto effect movement "or said type-carrying member to typing position; key-operated means for moving said actuator into engagement with said rotary ele'- ment; a knockout device including asubstantialrly U--shaped portion and a part engageable by saidactuator for moving the latter out o1 engagement with said rotary element; a xed guide on which said yU-shaped portion is slidable for mounting said I:knock out device for adjusting movementlto different positions with respect to saidrotary clement; a rotatable eccentric interposedbetween said guide -and the cross piece of` said lli-shaped portion forl'inoving saidlknockfout devicey to differentpositions; and spring mea-ns urging said U-'shaped portion into contact withsaid eccentric.

8. 11n' a typewriting machina-a frame; typecarrying members; means mounting saidv members` for movement from inactive position to typing yposition and return; `a power-driven toothed rotary element; and, respectively associated with caclrof a plurality of said members, a

iirst lever pivotcd on said, `frame at a pointton` onelside of said rotary element and being operatively connected to said type-carrying member; a rst link connected to said rst lever and extending transversely across said rotary element and having a nose normally disengaged from but being engageahle with said rotary clement for being actuated thereby to rock said rst lever and thus move said type-carrying member to typing position; a second lever pivoted on said frame at a point on the opposite side of said rotary element and having a rst arm extending toward said first lever, a second arm extending oppositely from said first arm, and a third arm extending between said rst and second arms; a second link connecting said rst link to said rst arm; a key 10 operated link-connected to said third arm for rocking said-second `lever and thereby moving saidv iirstA llink.` into engagement with said rotatable element; a fixed guide disposed between the i'lrst l and second arms of said second lever; a knockout deviceincluding a` partengageable with said rst linkaior movingit outof engagement with said rotary element, and' a U-shaped portion slid-:f able on said xedfguide for mounting said knockout-i device 1 `for I .adjusting movement to `different positions with respect to 'said rotary element;` spring means'interposed between said `U-shaped portion and said` second arm of said second leverfor wigingfsaid-nrst link to its normal position and for-urging saidknockfout device in one directionY on said guide; and adjusting means for moving said knock-.out device-in thefopposite direction on. said guida` 9. In-fa typewriting machine, type-carrying-v members; means tmounting said members form movement from-inactive position to typingy posi-l tioneand return; a toothed -rotarywelementaa motor a kinetic type iiuid. couplingl for transmit-` ting drive from'said motorito said toothed-rotary. element, the` .-latterbeing capable, because of the drive-transmitting vcharacteristics of said cou.v pling, ofnormally floating withrespect to said` motor; and, respectively associated with each of a plurality of said members, a irst lever operatively` connected to said type-carrying member; a first link connected to-saiddirst lever and having a part *normallyy disengaged vfrom said .l rotary element but being engageable therewith for being, actuatedthereby to rock said iirst lever and thusmove the type-carrying member Ato l.typing posi-U tion; a second lever; a second link pivotally con-` nectedleatits opposite.ends respectively to said. second ,-lever and to `said iirst link; `means for biasing.. said lrst .link to a position in which. said: first link part-is disengaged from said rotary ele-V ment; and keyfoperated means operatively icona. nectedto said .second Ylever and operative torock'.

thewlatter to vmove said rstlink part into vengagement with said rotaryelement.

l0.A Ina typewritingmachine, a frame; type,4

carrying members; means mounting. said meme. bers fori-.movement fromdnactive position .tot

typing position andtreturn; a toothed :rotary element;.a motori; `a kinetic type `fluid coupling` for transmittingldrive.from said motor to saidy toothed .rotary e1ement the latter being capable,v`

because of the drive-transmitting characteristicsof said coupling, ofnormally `floating with respect tosaid motor; and, respectively associated withf eachofa pluralityof` said members, a rst lever pivoted on said frame at a point on one side ofsaid. rotary element` and being operatively connected to. said typefcarrying member; a rst linkconnected to said first lever.. and :extending transversely,

acrosssaidrotary element, and having. a nose normally disengaged from but being engageable...

with. i said rotary telernent.4 for being` actuated thereby to rock said iirst lever and thus mov said type-carrying member to typing position; a second lever pivoted on said frame at a point on the opposite side of said rotary element and having an arm extending transversely with respect to said rotary element and toward said first lever; a second link connecting said first link to said arm of said second lever; means for biasing said irst link to be normally disengaged from said rotary element; key-operated means; and a third link operatively connecting said key-operated means to another arm of said second lever, whereby upon operation of said key-operated means said nose 11 is moved into engagement with said rotary element, and said first link and rst lever are driven to move said type-carrying member to typing position.

V1l. In a typewriting machine, type-carrying members; means mounting said members for movement from inactive position to typing position and return; a toothed rotary element; a motor; a kinetic type fluid coupling for transmitting drive from said motor to said toothed rotary element, the latter being capable, because of the drive-transmitting characteristics of said coupling, of normally floating with respect to said motor; and, respectively associated with each of a plurality of said members, power transmitting mechanism operatively connected to said typecarrying member and including an actuator normally disengaged from said rotary'element but being adapted to be moved into engagement with said element to be driven thereby so as to eiect movement of said type-carrying member to typing position; key-operated means for moving said actuator into engagement with said rotary element; and means for moving said actuator out of engagement with said rotary element including a part initially engageable by said actuator for rst moving the latter relatively slowly toward disengagement from said rotary element, and another part subsequently engageable by said :actuator for moving said actuator relatively abruptly from engagement with said rotary element.

12. In a typewriting machine, a plurality of type bars; a type bar segment; means pivoting said type bars on said segment; a power driven toothed rotary element; a series of levers pivoted to rock about an axis substantially parallel to the axis of said rotary element, said levers having arm ends respectively -connected to said type bars, the arms connected to the type bars at the center of the segment being shortest and the other lever arms increasing in length from the center towards the ends of the segment; pawls connected respectively to said levers and being normally disengaged from said rotary element; and key controlled means for moving said pawls into engagement with said rotary element t be driven thereby for moving said type bars to typing position, said pawls being of different lengths, shortest at the center and longest at the ends of the segment, whereby said lever arm ends will be moved through substantially equal arcuate distances.

13. In a typewriting machine, type-carrying members; means mounting said members for movement from inactive position to typing position and return; a power driven toothed rotary element; and, respectively associated with each of a plurality of -said members7 power transmitting mechanism operatively connected to said type-carrying member and including an actuator normally disengaged from said rotary element but being adapted to be moved into engagement with said element to be driven thereby so as to effect movement of said type-carrying member to typing position; key-operated means for moving said actuator into engagement with said rotary element; a knock-out device engageable by said actuator for moving the actuator out of engagement with said rotary element; means mounting said knock-out device for adjustment relatively to said rotary element; spring means urging said actuator to its normal position and also urging said knock-out device in one direction; and manually operable means connected to said knock-out device and being manipulatable for moving said device against the urge of said spring means to different positions of adjustment to thereby vary the point of disengagement of said actuator from said rotary element and consequently vary the type impact intensity.

1.4. In a typewriting machine, type-carrying members; means mounting said members for movement from inactive position to typing position and return; a motor; a toothed rotary element; a kinetic type fluid coupling for transmitting drive from said motor to said toothed rotary element, the latter being capable, because oi the impositive drive-transmitting characteristics of said coupling, of normally floating with respect to said motor; and, respectively associated with each of a plurality of said members, power-transmitting mechanism operatively connected to said type-carrying member and including an actuator normally disengaged from said rotary element but being adapted to be moved into ment with said element to be driven thereby so as to effect movement of said type-carrying member to typing position; and key-operated means for moving said actuator into engagement with said rotary element.

JOHN J. KITTEL.

REFERENCES CITED UNITED STATES PATENTS Number Name Date 336,725 Lasar Feb. 23, 1886 1,204,595 Roebuck Nov. 14, 1916 1,212,939 Handley Jan. 16, 191'? 1,420,259 Hedrick et al. June 20, 1922 1,614,475 I-Iokanson Jan. 18, 192'? 1,695,492 Hokanson Dec. 28, 1928 2,095,068 Koca Oct. 5, 1937 2,139,552 Kurowski Dec. 6, 1938 2,254,764 Yaeger Sept. 2, 1941 2,383,257 Kittel Aug. 2l, 1945 2,383,260 Kittel Aug. 21, 1945 FOREIGN PATENTS Number Country Date 15,954 Great Britain 1914 327,617 Germany 1920 

